Sash-fastener



(No Model.)

l G. GIBSON.

SASH FASTENER.

No. 473,419. Patented Apr. `19, 1892.

UNITED STATES PATENT OFFICE.

GEROLT GIBSON, OF ST. LOUIS, MISSOURI.

SASH-FASTENER.

SPECIFICATION forming part of Letters Patent No. 473,419, dated April19, 1892.

Application filed August 14, 1891.

'certain new and useful Improvements in Window-Sash Locks; and Ido'declare the following to be a full, clear, and exact description of-the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The object of my invention is to. provide a lock for windows that willbe automatic in action, will prevent rattling of the sashes, or

the lowering of the upper sash without first raising the lower sash,this lock being intended for use in connection with a lock for holdingthe lower sash in its closed position,- 'or which an application forLetters Patent was iiled on July 27, 1891, Serial No. 400,802.

In carrying out my invention I proceed as follows, reference being hadto the accompanying drawings, forming a part hereof, in which drawings-Figure l is a view in elevation looking toward the side casing of thewindow in illustration of my automatic window-sash lock as in positionfor locking the two sashes of a window together and to the casing, theparts being shown as in their locked position; and Fig. 2 is a similarview showing the parts as' in their unlocked position, the sashes beingslightly separated. Figs. 3, 4, and 5 are de- J[ached views in detailillustrating the construction of the several parts composing my lock.

The lettera designates the side frame or casing of a window, and b thevertical bead that separates the two sashes; c, the side vertical railof the upper sash; d, the meetingrail of the said upper sash, and e themeetingrail of the lower sash. Upon the top edge of the meeting-rail ofthe lower sash is fixed the member A of the lock, which has a hook end Aand a straight edge A2 for the purpose as will presently appear. Seatedwithin the front surface of the side rail of the upper sash,opposite inposition to that occupied by the member A, is the member B of the lock,which member has a curved socket, as at B', and a lug B2. Adjacent tothe member B and fixed to the front edge of the vertical bead thatseparates the two sashes is the third member C of the lock, and suchmember is composed of a base to which is pivoted, as at Serial No.402,643. (No model.)

c', a catch C', having at one extremity a hook c2 and the other endformed with a curved or camshaped surface c2. The hook c2 of the memberC corresponds in contour to the socketB of the member B, and the curvedend c2 of said member O is adapted to [it the hook end A of the memberA.

The operation of the parts is as follows: The parts of the lock being inthe position shown in Fig. 1, upon raising the lower sash the surface A2of the member A is brought against the under surface of the cam end ofthe catch C', causing said catch to turn upon its pivot c', and therebydisengaging the hook c2 from the member B, the parts of the lockassuming the position shown in Fig. 2.l Thus the lowering of the uppersash is permitted. To lock the sashes of the window together, the uppersash must first be raised to its normal position, and, the lower sashbeing raised, upon lowering the lower sash the hook end A of the memberA is brought into engagement with the top curved surfaceof the catchA Cand said catch caused to assume a nearly horizontal position, as in Fig.1,'with the hook end c2 engaging the lug B2 of the member B, so that theupper sash is locked and cannot be lowered without raising the lowersash to release the catch O', and the two sashes are by the said catchdrawn together and rattling thereof prevented.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The lock described for automatically locking theupper sash of a window to the Vertical bead of the outside casing and tothe lower sash, composed of the member A, hav- `ing hook end A securedupon the top sur- GEROLT GIBSON. Vitnesses:

W. P. HowE, J. I-I. WATERS.

IOO

